1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Intel Corporation
10 #include <sys/epoll.h>
11 #include <linux/virtio_net.h>
14 #include <rte_eal_paging.h>
15 #include <rte_malloc.h>
16 #include <rte_memory.h>
17 #include <rte_bus_pci.h>
18 #include <rte_vhost.h>
20 #include <vdpa_driver.h>
22 #include <rte_spinlock.h>
24 #include <rte_kvargs.h>
25 #include <rte_devargs.h>
27 #include "base/ifcvf.h"
29 RTE_LOG_REGISTER(ifcvf_vdpa_logtype, pmd.vdpa.ifcvf, NOTICE);
30 #define DRV_LOG(level, fmt, args...) \
31 rte_log(RTE_LOG_ ## level, ifcvf_vdpa_logtype, \
32 "IFCVF %s(): " fmt "\n", __func__, ##args)
34 #define IFCVF_USED_RING_LEN(size) \
35 ((size) * sizeof(struct vring_used_elem) + sizeof(uint16_t) * 3)
37 #define IFCVF_VDPA_MODE "vdpa"
38 #define IFCVF_SW_FALLBACK_LM "sw-live-migration"
40 #define THREAD_NAME_LEN 16
42 static const char * const ifcvf_valid_arguments[] = {
48 struct ifcvf_internal {
49 struct rte_pci_device *pdev;
52 int vfio_container_fd;
55 pthread_t tid; /* thread for notify relay */
58 struct rte_vdpa_device *vdev;
61 rte_atomic32_t started;
62 rte_atomic32_t dev_attached;
63 rte_atomic32_t running;
66 bool sw_fallback_running;
67 /* mediated vring for sw fallback */
68 struct vring m_vring[IFCVF_MAX_QUEUES * 2];
69 /* eventfd for used ring interrupt */
70 int intr_fd[IFCVF_MAX_QUEUES * 2];
73 struct internal_list {
74 TAILQ_ENTRY(internal_list) next;
75 struct ifcvf_internal *internal;
78 TAILQ_HEAD(internal_list_head, internal_list);
79 static struct internal_list_head internal_list =
80 TAILQ_HEAD_INITIALIZER(internal_list);
82 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
84 static void update_used_ring(struct ifcvf_internal *internal, uint16_t qid);
86 static struct internal_list *
87 find_internal_resource_by_vdev(struct rte_vdpa_device *vdev)
90 struct internal_list *list;
92 pthread_mutex_lock(&internal_list_lock);
94 TAILQ_FOREACH(list, &internal_list, next) {
95 if (vdev == list->internal->vdev) {
101 pthread_mutex_unlock(&internal_list_lock);
109 static struct internal_list *
110 find_internal_resource_by_dev(struct rte_pci_device *pdev)
113 struct internal_list *list;
115 pthread_mutex_lock(&internal_list_lock);
117 TAILQ_FOREACH(list, &internal_list, next) {
118 if (!rte_pci_addr_cmp(&pdev->addr,
119 &list->internal->pdev->addr)) {
125 pthread_mutex_unlock(&internal_list_lock);
134 ifcvf_vfio_setup(struct ifcvf_internal *internal)
136 struct rte_pci_device *dev = internal->pdev;
137 char devname[RTE_DEV_NAME_MAX_LEN] = {0};
141 internal->vfio_dev_fd = -1;
142 internal->vfio_group_fd = -1;
143 internal->vfio_container_fd = -1;
145 rte_pci_device_name(&dev->addr, devname, RTE_DEV_NAME_MAX_LEN);
146 ret = rte_vfio_get_group_num(rte_pci_get_sysfs_path(), devname,
149 DRV_LOG(ERR, "%s failed to get IOMMU group", devname);
153 internal->vfio_container_fd = rte_vfio_container_create();
154 if (internal->vfio_container_fd < 0)
157 internal->vfio_group_fd = rte_vfio_container_group_bind(
158 internal->vfio_container_fd, iommu_group_num);
159 if (internal->vfio_group_fd < 0)
162 if (rte_pci_map_device(dev))
165 internal->vfio_dev_fd = rte_intr_dev_fd_get(dev->intr_handle);
167 for (i = 0; i < RTE_MIN(PCI_MAX_RESOURCE, IFCVF_PCI_MAX_RESOURCE);
169 internal->hw.mem_resource[i].addr =
170 internal->pdev->mem_resource[i].addr;
171 internal->hw.mem_resource[i].phys_addr =
172 internal->pdev->mem_resource[i].phys_addr;
173 internal->hw.mem_resource[i].len =
174 internal->pdev->mem_resource[i].len;
180 rte_vfio_container_destroy(internal->vfio_container_fd);
185 ifcvf_dma_map(struct ifcvf_internal *internal, bool do_map)
189 struct rte_vhost_memory *mem = NULL;
190 int vfio_container_fd;
192 ret = rte_vhost_get_mem_table(internal->vid, &mem);
194 DRV_LOG(ERR, "failed to get VM memory layout.");
198 vfio_container_fd = internal->vfio_container_fd;
200 for (i = 0; i < mem->nregions; i++) {
201 struct rte_vhost_mem_region *reg;
203 reg = &mem->regions[i];
204 DRV_LOG(INFO, "%s, region %u: HVA 0x%" PRIx64 ", "
205 "GPA 0x%" PRIx64 ", size 0x%" PRIx64 ".",
206 do_map ? "DMA map" : "DMA unmap", i,
207 reg->host_user_addr, reg->guest_phys_addr, reg->size);
210 ret = rte_vfio_container_dma_map(vfio_container_fd,
211 reg->host_user_addr, reg->guest_phys_addr,
214 DRV_LOG(ERR, "DMA map failed.");
218 ret = rte_vfio_container_dma_unmap(vfio_container_fd,
219 reg->host_user_addr, reg->guest_phys_addr,
222 DRV_LOG(ERR, "DMA unmap failed.");
234 hva_to_gpa(int vid, uint64_t hva)
236 struct rte_vhost_memory *mem = NULL;
237 struct rte_vhost_mem_region *reg;
241 if (rte_vhost_get_mem_table(vid, &mem) < 0)
244 for (i = 0; i < mem->nregions; i++) {
245 reg = &mem->regions[i];
247 if (hva >= reg->host_user_addr &&
248 hva < reg->host_user_addr + reg->size) {
249 gpa = hva - reg->host_user_addr + reg->guest_phys_addr;
260 vdpa_ifcvf_start(struct ifcvf_internal *internal)
262 struct ifcvf_hw *hw = &internal->hw;
265 struct rte_vhost_vring vq;
269 nr_vring = rte_vhost_get_vring_num(vid);
270 rte_vhost_get_negotiated_features(vid, &hw->req_features);
272 for (i = 0; i < nr_vring; i++) {
273 rte_vhost_get_vhost_vring(vid, i, &vq);
274 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.desc);
276 DRV_LOG(ERR, "Fail to get GPA for descriptor ring.");
279 hw->vring[i].desc = gpa;
281 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.avail);
283 DRV_LOG(ERR, "Fail to get GPA for available ring.");
286 hw->vring[i].avail = gpa;
288 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.used);
290 DRV_LOG(ERR, "Fail to get GPA for used ring.");
293 hw->vring[i].used = gpa;
295 hw->vring[i].size = vq.size;
296 rte_vhost_get_vring_base(vid, i, &hw->vring[i].last_avail_idx,
297 &hw->vring[i].last_used_idx);
301 return ifcvf_start_hw(&internal->hw);
305 vdpa_ifcvf_stop(struct ifcvf_internal *internal)
307 struct ifcvf_hw *hw = &internal->hw;
310 uint64_t features = 0;
311 uint64_t log_base = 0, log_size = 0;
317 for (i = 0; i < hw->nr_vring; i++)
318 rte_vhost_set_vring_base(vid, i, hw->vring[i].last_avail_idx,
319 hw->vring[i].last_used_idx);
324 rte_vhost_get_negotiated_features(vid, &features);
325 if (RTE_VHOST_NEED_LOG(features)) {
326 ifcvf_disable_logging(hw);
327 rte_vhost_get_log_base(internal->vid, &log_base, &log_size);
328 rte_vfio_container_dma_unmap(internal->vfio_container_fd,
329 log_base, IFCVF_LOG_BASE, log_size);
331 * IFCVF marks dirty memory pages for only packet buffer,
332 * SW helps to mark the used ring as dirty after device stops.
334 for (i = 0; i < hw->nr_vring; i++) {
335 len = IFCVF_USED_RING_LEN(hw->vring[i].size);
336 rte_vhost_log_used_vring(vid, i, 0, len);
341 #define MSIX_IRQ_SET_BUF_LEN (sizeof(struct vfio_irq_set) + \
342 sizeof(int) * (IFCVF_MAX_QUEUES * 2 + 1))
344 vdpa_enable_vfio_intr(struct ifcvf_internal *internal, bool m_rx)
347 uint32_t i, nr_vring;
348 char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
349 struct vfio_irq_set *irq_set;
351 struct rte_vhost_vring vring;
356 nr_vring = rte_vhost_get_vring_num(internal->vid);
358 irq_set = (struct vfio_irq_set *)irq_set_buf;
359 irq_set->argsz = sizeof(irq_set_buf);
360 irq_set->count = nr_vring + 1;
361 irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
362 VFIO_IRQ_SET_ACTION_TRIGGER;
363 irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
365 fd_ptr = (int *)&irq_set->data;
366 fd_ptr[RTE_INTR_VEC_ZERO_OFFSET] =
367 rte_intr_fd_get(internal->pdev->intr_handle);
369 for (i = 0; i < nr_vring; i++)
370 internal->intr_fd[i] = -1;
372 for (i = 0; i < nr_vring; i++) {
373 rte_vhost_get_vhost_vring(internal->vid, i, &vring);
374 fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = vring.callfd;
375 if ((i & 1) == 0 && m_rx == true) {
376 fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
378 DRV_LOG(ERR, "can't setup eventfd: %s",
382 internal->intr_fd[i] = fd;
383 fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = fd;
387 ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
389 DRV_LOG(ERR, "Error enabling MSI-X interrupts: %s",
398 vdpa_disable_vfio_intr(struct ifcvf_internal *internal)
401 uint32_t i, nr_vring;
402 char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
403 struct vfio_irq_set *irq_set;
405 irq_set = (struct vfio_irq_set *)irq_set_buf;
406 irq_set->argsz = sizeof(irq_set_buf);
408 irq_set->flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER;
409 irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
412 nr_vring = rte_vhost_get_vring_num(internal->vid);
413 for (i = 0; i < nr_vring; i++) {
414 if (internal->intr_fd[i] >= 0)
415 close(internal->intr_fd[i]);
416 internal->intr_fd[i] = -1;
419 ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
421 DRV_LOG(ERR, "Error disabling MSI-X interrupts: %s",
430 notify_relay(void *arg)
432 int i, kickfd, epfd, nfds = 0;
434 struct epoll_event events[IFCVF_MAX_QUEUES * 2];
435 struct epoll_event ev;
438 struct rte_vhost_vring vring;
439 struct ifcvf_internal *internal = (struct ifcvf_internal *)arg;
440 struct ifcvf_hw *hw = &internal->hw;
442 q_num = rte_vhost_get_vring_num(internal->vid);
444 epfd = epoll_create(IFCVF_MAX_QUEUES * 2);
446 DRV_LOG(ERR, "failed to create epoll instance.");
449 internal->epfd = epfd;
452 for (qid = 0; qid < q_num; qid++) {
453 ev.events = EPOLLIN | EPOLLPRI;
454 rte_vhost_get_vhost_vring(internal->vid, qid, &vring);
455 ev.data.u64 = qid | (uint64_t)vring.kickfd << 32;
456 if (epoll_ctl(epfd, EPOLL_CTL_ADD, vring.kickfd, &ev) < 0) {
457 DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
463 nfds = epoll_wait(epfd, events, q_num, -1);
467 DRV_LOG(ERR, "epoll_wait return fail\n");
471 for (i = 0; i < nfds; i++) {
472 qid = events[i].data.u32;
473 kickfd = (uint32_t)(events[i].data.u64 >> 32);
475 nbytes = read(kickfd, &buf, 8);
477 if (errno == EINTR ||
478 errno == EWOULDBLOCK ||
481 DRV_LOG(INFO, "Error reading "
488 ifcvf_notify_queue(hw, qid);
496 setup_notify_relay(struct ifcvf_internal *internal)
498 char name[THREAD_NAME_LEN];
501 snprintf(name, sizeof(name), "ifc-notify-%d", internal->vid);
502 ret = rte_ctrl_thread_create(&internal->tid, name, NULL, notify_relay,
505 DRV_LOG(ERR, "failed to create notify relay pthread.");
513 unset_notify_relay(struct ifcvf_internal *internal)
518 pthread_cancel(internal->tid);
519 pthread_join(internal->tid, &status);
523 if (internal->epfd >= 0)
524 close(internal->epfd);
531 update_datapath(struct ifcvf_internal *internal)
535 rte_spinlock_lock(&internal->lock);
537 if (!rte_atomic32_read(&internal->running) &&
538 (rte_atomic32_read(&internal->started) &&
539 rte_atomic32_read(&internal->dev_attached))) {
540 ret = ifcvf_dma_map(internal, true);
544 ret = vdpa_enable_vfio_intr(internal, false);
548 ret = vdpa_ifcvf_start(internal);
552 ret = setup_notify_relay(internal);
556 rte_atomic32_set(&internal->running, 1);
557 } else if (rte_atomic32_read(&internal->running) &&
558 (!rte_atomic32_read(&internal->started) ||
559 !rte_atomic32_read(&internal->dev_attached))) {
560 ret = unset_notify_relay(internal);
564 vdpa_ifcvf_stop(internal);
566 ret = vdpa_disable_vfio_intr(internal);
570 ret = ifcvf_dma_map(internal, false);
574 rte_atomic32_set(&internal->running, 0);
577 rte_spinlock_unlock(&internal->lock);
580 rte_spinlock_unlock(&internal->lock);
585 m_ifcvf_start(struct ifcvf_internal *internal)
587 struct ifcvf_hw *hw = &internal->hw;
588 uint32_t i, nr_vring;
590 struct rte_vhost_vring vq;
592 uint64_t m_vring_iova = IFCVF_MEDIATED_VRING;
596 memset(&vq, 0, sizeof(vq));
598 nr_vring = rte_vhost_get_vring_num(vid);
599 rte_vhost_get_negotiated_features(vid, &hw->req_features);
601 for (i = 0; i < nr_vring; i++) {
602 rte_vhost_get_vhost_vring(vid, i, &vq);
604 size = RTE_ALIGN_CEIL(vring_size(vq.size, rte_mem_page_size()),
605 rte_mem_page_size());
606 vring_buf = rte_zmalloc("ifcvf", size, rte_mem_page_size());
607 vring_init(&internal->m_vring[i], vq.size, vring_buf,
608 rte_mem_page_size());
610 ret = rte_vfio_container_dma_map(internal->vfio_container_fd,
611 (uint64_t)(uintptr_t)vring_buf, m_vring_iova, size);
613 DRV_LOG(ERR, "mediated vring DMA map failed.");
617 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.desc);
619 DRV_LOG(ERR, "Fail to get GPA for descriptor ring.");
622 hw->vring[i].desc = gpa;
624 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.avail);
626 DRV_LOG(ERR, "Fail to get GPA for available ring.");
629 hw->vring[i].avail = gpa;
631 /* Direct I/O for Tx queue, relay for Rx queue */
633 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.used);
635 DRV_LOG(ERR, "Fail to get GPA for used ring.");
638 hw->vring[i].used = gpa;
640 hw->vring[i].used = m_vring_iova +
641 (char *)internal->m_vring[i].used -
642 (char *)internal->m_vring[i].desc;
645 hw->vring[i].size = vq.size;
647 rte_vhost_get_vring_base(vid, i,
648 &internal->m_vring[i].avail->idx,
649 &internal->m_vring[i].used->idx);
651 rte_vhost_get_vring_base(vid, i, &hw->vring[i].last_avail_idx,
652 &hw->vring[i].last_used_idx);
654 m_vring_iova += size;
656 hw->nr_vring = nr_vring;
658 return ifcvf_start_hw(&internal->hw);
661 for (i = 0; i < nr_vring; i++)
662 rte_free(internal->m_vring[i].desc);
668 m_ifcvf_stop(struct ifcvf_internal *internal)
672 struct rte_vhost_vring vq;
673 struct ifcvf_hw *hw = &internal->hw;
674 uint64_t m_vring_iova = IFCVF_MEDIATED_VRING;
680 for (i = 0; i < hw->nr_vring; i++) {
681 /* synchronize remaining new used entries if any */
683 update_used_ring(internal, i);
685 rte_vhost_get_vhost_vring(vid, i, &vq);
686 len = IFCVF_USED_RING_LEN(vq.size);
687 rte_vhost_log_used_vring(vid, i, 0, len);
689 size = RTE_ALIGN_CEIL(vring_size(vq.size, rte_mem_page_size()),
690 rte_mem_page_size());
691 rte_vfio_container_dma_unmap(internal->vfio_container_fd,
692 (uint64_t)(uintptr_t)internal->m_vring[i].desc,
695 rte_vhost_set_vring_base(vid, i, hw->vring[i].last_avail_idx,
696 hw->vring[i].last_used_idx);
697 rte_free(internal->m_vring[i].desc);
698 m_vring_iova += size;
705 update_used_ring(struct ifcvf_internal *internal, uint16_t qid)
707 rte_vdpa_relay_vring_used(internal->vid, qid, &internal->m_vring[qid]);
708 rte_vhost_vring_call(internal->vid, qid);
712 vring_relay(void *arg)
714 int i, vid, epfd, fd, nfds;
715 struct ifcvf_internal *internal = (struct ifcvf_internal *)arg;
716 struct rte_vhost_vring vring;
718 struct epoll_event events[IFCVF_MAX_QUEUES * 4];
719 struct epoll_event ev;
724 q_num = rte_vhost_get_vring_num(vid);
726 /* add notify fd and interrupt fd to epoll */
727 epfd = epoll_create(IFCVF_MAX_QUEUES * 2);
729 DRV_LOG(ERR, "failed to create epoll instance.");
732 internal->epfd = epfd;
735 for (qid = 0; qid < q_num; qid++) {
736 ev.events = EPOLLIN | EPOLLPRI;
737 rte_vhost_get_vhost_vring(vid, qid, &vring);
738 ev.data.u64 = qid << 1 | (uint64_t)vring.kickfd << 32;
739 if (epoll_ctl(epfd, EPOLL_CTL_ADD, vring.kickfd, &ev) < 0) {
740 DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
745 for (qid = 0; qid < q_num; qid += 2) {
746 ev.events = EPOLLIN | EPOLLPRI;
747 /* leave a flag to mark it's for interrupt */
748 ev.data.u64 = 1 | qid << 1 |
749 (uint64_t)internal->intr_fd[qid] << 32;
750 if (epoll_ctl(epfd, EPOLL_CTL_ADD, internal->intr_fd[qid], &ev)
752 DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
755 update_used_ring(internal, qid);
758 /* start relay with a first kick */
759 for (qid = 0; qid < q_num; qid++)
760 ifcvf_notify_queue(&internal->hw, qid);
762 /* listen to the events and react accordingly */
764 nfds = epoll_wait(epfd, events, q_num * 2, -1);
768 DRV_LOG(ERR, "epoll_wait return fail\n");
772 for (i = 0; i < nfds; i++) {
773 fd = (uint32_t)(events[i].data.u64 >> 32);
775 nbytes = read(fd, &buf, 8);
777 if (errno == EINTR ||
778 errno == EWOULDBLOCK ||
781 DRV_LOG(INFO, "Error reading "
788 qid = events[i].data.u32 >> 1;
790 if (events[i].data.u32 & 1)
791 update_used_ring(internal, qid);
793 ifcvf_notify_queue(&internal->hw, qid);
801 setup_vring_relay(struct ifcvf_internal *internal)
803 char name[THREAD_NAME_LEN];
806 snprintf(name, sizeof(name), "ifc-vring-%d", internal->vid);
807 ret = rte_ctrl_thread_create(&internal->tid, name, NULL, vring_relay,
810 DRV_LOG(ERR, "failed to create ring relay pthread.");
818 unset_vring_relay(struct ifcvf_internal *internal)
823 pthread_cancel(internal->tid);
824 pthread_join(internal->tid, &status);
828 if (internal->epfd >= 0)
829 close(internal->epfd);
836 ifcvf_sw_fallback_switchover(struct ifcvf_internal *internal)
839 int vid = internal->vid;
841 /* stop the direct IO data path */
842 unset_notify_relay(internal);
843 vdpa_ifcvf_stop(internal);
844 vdpa_disable_vfio_intr(internal);
846 ret = rte_vhost_host_notifier_ctrl(vid, RTE_VHOST_QUEUE_ALL, false);
847 if (ret && ret != -ENOTSUP)
850 /* set up interrupt for interrupt relay */
851 ret = vdpa_enable_vfio_intr(internal, true);
856 ret = m_ifcvf_start(internal);
860 /* set up vring relay thread */
861 ret = setup_vring_relay(internal);
865 rte_vhost_host_notifier_ctrl(vid, RTE_VHOST_QUEUE_ALL, true);
867 internal->sw_fallback_running = true;
872 m_ifcvf_stop(internal);
874 vdpa_disable_vfio_intr(internal);
876 ifcvf_dma_map(internal, false);
882 ifcvf_dev_config(int vid)
884 struct rte_vdpa_device *vdev;
885 struct internal_list *list;
886 struct ifcvf_internal *internal;
888 vdev = rte_vhost_get_vdpa_device(vid);
889 list = find_internal_resource_by_vdev(vdev);
891 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
895 internal = list->internal;
897 rte_atomic32_set(&internal->dev_attached, 1);
898 update_datapath(internal);
900 if (rte_vhost_host_notifier_ctrl(vid, RTE_VHOST_QUEUE_ALL, true) != 0)
901 DRV_LOG(NOTICE, "vDPA (%s): software relay is used.",
904 internal->configured = 1;
909 ifcvf_dev_close(int vid)
911 struct rte_vdpa_device *vdev;
912 struct internal_list *list;
913 struct ifcvf_internal *internal;
915 vdev = rte_vhost_get_vdpa_device(vid);
916 list = find_internal_resource_by_vdev(vdev);
918 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
922 internal = list->internal;
924 if (internal->sw_fallback_running) {
925 /* unset ring relay */
926 unset_vring_relay(internal);
929 m_ifcvf_stop(internal);
931 /* remove interrupt setting */
932 vdpa_disable_vfio_intr(internal);
934 /* unset DMA map for guest memory */
935 ifcvf_dma_map(internal, false);
937 internal->sw_fallback_running = false;
939 rte_atomic32_set(&internal->dev_attached, 0);
940 update_datapath(internal);
943 internal->configured = 0;
948 ifcvf_set_features(int vid)
950 uint64_t features = 0;
951 struct rte_vdpa_device *vdev;
952 struct internal_list *list;
953 struct ifcvf_internal *internal;
954 uint64_t log_base = 0, log_size = 0;
956 vdev = rte_vhost_get_vdpa_device(vid);
957 list = find_internal_resource_by_vdev(vdev);
959 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
963 internal = list->internal;
964 rte_vhost_get_negotiated_features(vid, &features);
966 if (!RTE_VHOST_NEED_LOG(features))
969 if (internal->sw_lm) {
970 ifcvf_sw_fallback_switchover(internal);
972 rte_vhost_get_log_base(vid, &log_base, &log_size);
973 rte_vfio_container_dma_map(internal->vfio_container_fd,
974 log_base, IFCVF_LOG_BASE, log_size);
975 ifcvf_enable_logging(&internal->hw, IFCVF_LOG_BASE, log_size);
982 ifcvf_get_vfio_group_fd(int vid)
984 struct rte_vdpa_device *vdev;
985 struct internal_list *list;
987 vdev = rte_vhost_get_vdpa_device(vid);
988 list = find_internal_resource_by_vdev(vdev);
990 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
994 return list->internal->vfio_group_fd;
998 ifcvf_get_vfio_device_fd(int vid)
1000 struct rte_vdpa_device *vdev;
1001 struct internal_list *list;
1003 vdev = rte_vhost_get_vdpa_device(vid);
1004 list = find_internal_resource_by_vdev(vdev);
1006 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1010 return list->internal->vfio_dev_fd;
1014 ifcvf_get_notify_area(int vid, int qid, uint64_t *offset, uint64_t *size)
1016 struct rte_vdpa_device *vdev;
1017 struct internal_list *list;
1018 struct ifcvf_internal *internal;
1019 struct vfio_region_info reg = { .argsz = sizeof(reg) };
1022 vdev = rte_vhost_get_vdpa_device(vid);
1023 list = find_internal_resource_by_vdev(vdev);
1025 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1029 internal = list->internal;
1031 reg.index = ifcvf_get_notify_region(&internal->hw);
1032 ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_GET_REGION_INFO, ®);
1034 DRV_LOG(ERR, "Get not get device region info: %s",
1039 *offset = ifcvf_get_queue_notify_off(&internal->hw, qid) + reg.offset;
1046 ifcvf_get_queue_num(struct rte_vdpa_device *vdev, uint32_t *queue_num)
1048 struct internal_list *list;
1050 list = find_internal_resource_by_vdev(vdev);
1052 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1056 *queue_num = list->internal->max_queues;
1062 ifcvf_get_vdpa_features(struct rte_vdpa_device *vdev, uint64_t *features)
1064 struct internal_list *list;
1066 list = find_internal_resource_by_vdev(vdev);
1068 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1072 *features = list->internal->features;
1077 #define VDPA_SUPPORTED_PROTOCOL_FEATURES \
1078 (1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK | \
1079 1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ | \
1080 1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD | \
1081 1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER | \
1082 1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD | \
1083 1ULL << VHOST_USER_PROTOCOL_F_STATUS)
1085 ifcvf_get_protocol_features(struct rte_vdpa_device *vdev, uint64_t *features)
1089 *features = VDPA_SUPPORTED_PROTOCOL_FEATURES;
1094 ifcvf_set_vring_state(int vid, int vring, int state)
1096 struct rte_vdpa_device *vdev;
1097 struct internal_list *list;
1098 struct ifcvf_internal *internal;
1099 struct ifcvf_hw *hw;
1100 struct ifcvf_pci_common_cfg *cfg;
1103 vdev = rte_vhost_get_vdpa_device(vid);
1104 list = find_internal_resource_by_vdev(vdev);
1106 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1110 internal = list->internal;
1111 if (vring < 0 || vring >= internal->max_queues * 2) {
1112 DRV_LOG(ERR, "Vring index %d not correct", vring);
1117 if (!internal->configured)
1120 cfg = hw->common_cfg;
1121 IFCVF_WRITE_REG16(vring, &cfg->queue_select);
1122 IFCVF_WRITE_REG16(!!state, &cfg->queue_enable);
1124 if (!state && hw->vring[vring].enable) {
1125 ret = vdpa_disable_vfio_intr(internal);
1130 if (state && !hw->vring[vring].enable) {
1131 ret = vdpa_enable_vfio_intr(internal, false);
1137 hw->vring[vring].enable = !!state;
1141 static struct rte_vdpa_dev_ops ifcvf_ops = {
1142 .get_queue_num = ifcvf_get_queue_num,
1143 .get_features = ifcvf_get_vdpa_features,
1144 .get_protocol_features = ifcvf_get_protocol_features,
1145 .dev_conf = ifcvf_dev_config,
1146 .dev_close = ifcvf_dev_close,
1147 .set_vring_state = ifcvf_set_vring_state,
1148 .set_features = ifcvf_set_features,
1149 .migration_done = NULL,
1150 .get_vfio_group_fd = ifcvf_get_vfio_group_fd,
1151 .get_vfio_device_fd = ifcvf_get_vfio_device_fd,
1152 .get_notify_area = ifcvf_get_notify_area,
1156 open_int(const char *key __rte_unused, const char *value, void *extra_args)
1158 uint16_t *n = extra_args;
1160 if (value == NULL || extra_args == NULL)
1163 *n = (uint16_t)strtoul(value, NULL, 0);
1164 if (*n == USHRT_MAX && errno == ERANGE)
1171 ifcvf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1172 struct rte_pci_device *pci_dev)
1175 struct ifcvf_internal *internal = NULL;
1176 struct internal_list *list = NULL;
1178 int sw_fallback_lm = 0;
1179 struct rte_kvargs *kvlist = NULL;
1182 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1185 if (!pci_dev->device.devargs)
1188 kvlist = rte_kvargs_parse(pci_dev->device.devargs->args,
1189 ifcvf_valid_arguments);
1193 /* probe only when vdpa mode is specified */
1194 if (rte_kvargs_count(kvlist, IFCVF_VDPA_MODE) == 0) {
1195 rte_kvargs_free(kvlist);
1199 ret = rte_kvargs_process(kvlist, IFCVF_VDPA_MODE, &open_int,
1201 if (ret < 0 || vdpa_mode == 0) {
1202 rte_kvargs_free(kvlist);
1206 list = rte_zmalloc("ifcvf", sizeof(*list), 0);
1210 internal = rte_zmalloc("ifcvf", sizeof(*internal), 0);
1211 if (internal == NULL)
1214 internal->pdev = pci_dev;
1215 rte_spinlock_init(&internal->lock);
1217 if (ifcvf_vfio_setup(internal) < 0) {
1218 DRV_LOG(ERR, "failed to setup device %s", pci_dev->name);
1222 if (ifcvf_init_hw(&internal->hw, internal->pdev) < 0) {
1223 DRV_LOG(ERR, "failed to init device %s", pci_dev->name);
1227 internal->configured = 0;
1228 internal->max_queues = IFCVF_MAX_QUEUES;
1229 features = ifcvf_get_features(&internal->hw);
1230 internal->features = (features &
1231 ~(1ULL << VIRTIO_F_IOMMU_PLATFORM)) |
1232 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) |
1233 (1ULL << VIRTIO_NET_F_CTRL_VQ) |
1234 (1ULL << VIRTIO_NET_F_STATUS) |
1235 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) |
1236 (1ULL << VHOST_F_LOG_ALL);
1238 list->internal = internal;
1240 if (rte_kvargs_count(kvlist, IFCVF_SW_FALLBACK_LM)) {
1241 ret = rte_kvargs_process(kvlist, IFCVF_SW_FALLBACK_LM,
1242 &open_int, &sw_fallback_lm);
1246 internal->sw_lm = sw_fallback_lm;
1248 internal->vdev = rte_vdpa_register_device(&pci_dev->device, &ifcvf_ops);
1249 if (internal->vdev == NULL) {
1250 DRV_LOG(ERR, "failed to register device %s", pci_dev->name);
1254 pthread_mutex_lock(&internal_list_lock);
1255 TAILQ_INSERT_TAIL(&internal_list, list, next);
1256 pthread_mutex_unlock(&internal_list_lock);
1258 rte_atomic32_set(&internal->started, 1);
1259 update_datapath(internal);
1261 rte_kvargs_free(kvlist);
1265 rte_kvargs_free(kvlist);
1272 ifcvf_pci_remove(struct rte_pci_device *pci_dev)
1274 struct ifcvf_internal *internal;
1275 struct internal_list *list;
1277 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1280 list = find_internal_resource_by_dev(pci_dev);
1282 DRV_LOG(ERR, "Invalid device: %s", pci_dev->name);
1286 internal = list->internal;
1287 rte_atomic32_set(&internal->started, 0);
1288 update_datapath(internal);
1290 rte_pci_unmap_device(internal->pdev);
1291 rte_vfio_container_destroy(internal->vfio_container_fd);
1292 rte_vdpa_unregister_device(internal->vdev);
1294 pthread_mutex_lock(&internal_list_lock);
1295 TAILQ_REMOVE(&internal_list, list, next);
1296 pthread_mutex_unlock(&internal_list_lock);
1305 * IFCVF has the same vendor ID and device ID as virtio net PCI
1306 * device, with its specific subsystem vendor ID and device ID.
1308 static const struct rte_pci_id pci_id_ifcvf_map[] = {
1309 { .class_id = RTE_CLASS_ANY_ID,
1310 .vendor_id = IFCVF_VENDOR_ID,
1311 .device_id = IFCVF_DEVICE_ID,
1312 .subsystem_vendor_id = IFCVF_SUBSYS_VENDOR_ID,
1313 .subsystem_device_id = IFCVF_SUBSYS_DEVICE_ID,
1316 { .vendor_id = 0, /* sentinel */
1320 static struct rte_pci_driver rte_ifcvf_vdpa = {
1321 .id_table = pci_id_ifcvf_map,
1323 .probe = ifcvf_pci_probe,
1324 .remove = ifcvf_pci_remove,
1327 RTE_PMD_REGISTER_PCI(net_ifcvf, rte_ifcvf_vdpa);
1328 RTE_PMD_REGISTER_PCI_TABLE(net_ifcvf, pci_id_ifcvf_map);
1329 RTE_PMD_REGISTER_KMOD_DEP(net_ifcvf, "* vfio-pci");